SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track - BQ20Z95


SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track

Recommended alternative parts

  • BQ20Z65-R1  -  The BQ20Z65-R1 is a pin to pin compatible upgrade to the BQ20Z95. Improvements include updated Impedance Track™ gas gauging, advanced charge control


The bq20z95 SBS-compliant gas gauge and protection IC is a single IC solution designed for battery-pack or in-system installation. The bq20z95 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals, monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack as well and reports the information to the system host controller over a serial-communication bus. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq20z95 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.

The implemented Impedance Track™ gas gauging technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle with high accuracy.


  • Next Generation Patented Impedance Track Technology Accurately Measures
    Available Charge in Li-Ion and Li-Polymer Batteries
    • Better Than 1% Error Over Lifetime of the Battery
  • Supports the Smart Battery Specification
    SBS V1.1
  • Flexible Configuration for 2-Series to 4-Series Li-Ion and Li-Polymer
  • Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
  • Full Array of Programmable Protection Features
    • Voltage, Current, and Temperature
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Small 44-Pin TSSOP (DBT) Package

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Parametrics Compare all products in Battery Fuel Gauge

# Series Cells
Cell Chemistry
Battery Capacity (Max) (mAh)
Communication Interface
Battery Capacity (Min) (mAh)
External Capacity Indication
Gas Gauge Algorithm
Cell Balancing
Special Features
Operating Temperature Range (C)
Approx. Price (US$)
BQ20Z95 BQ20Z70-V160 BQ20Z75-V180 BQ20Z90-V150
2-4 Cells     2-4 Cells     2-4 Cells     2-4 Cells    
15000     15000     15000     15000    
SMBus     SMBus     SMBus     SMBus    
800     800     800     800    
LED         LED    
Pack     Pack     Pack     Pack    
Impedance Track     Impedance Track     Impedance Track     Impedance Track    
Internal     Internal     Internal     Internal    
SHA-1 Authentication     SHA-1 Authentication     SHA-1 Authentication     SHA-1 Authentication    
-40 to 85     -40 to 85     -40 to 85     -40 to 85    
44TSSOP     20TSSOP     38TSSOP     30TSSOP    
4.10 | 1ku     2.85 | 1ku     3.75 | 1ku     3.30 | 1ku    

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